Leap year

#include<stdio.h>
int main()
{
    int a;
    printf("Enter a year");
    scanf("%d",&a);
    if(a%100)
    {
        // not a century year
        if(a%4)
        printf("Not a leap year");
        else
        printf("Leap year");
    }
    else
    {
        // century year
        if(a%400)
        printf("Not a leap year");
        else
        printf("Leap year");
    }
    return 0;
}



method 2


#include<stdio.h>
int main()
{
    int a;
    printf("Enter a year");
    scanf("%d",&a);
    if(a%100)
        a%4?printf("Not a leap year"):printf("Leap year");
    else
        a%400?printf("Not a leap year"):printf("Leap year");
    return 0;
}



method 3


#include<stdio.h>
int main()
{
    int a;
    printf("Enter a year");
    scanf("%d",&a);
    if(a%100)
        printf(a%4?"Not a leap year":"Leap year");
    else
        printf(a%400?"Not a leap year":"Leap year");
    return 0;
}


method 3 (short)


#include<stdio.h>
int main()
{
    int a;
    printf("Enter a year");
    scanf("%d",&a);
    printf(a%100?(a%4?"Not a leap year":"Leap year"):(a%400?"Not a leap year":"Leap year"));
    return 0;
}